Mechanical movement



' c; LITT LEFIELD MECHANICAL MOVEMENT Feb. 4, 1930.

Filed Oct. 9. 1926 N l" E 1\" TON Car/ Li/f/e fie/d 4 L.

Patented Feb. 4, 1930' CARL LITTLEFIELD, OF BATTLE CREEK, MICHIGAN,ASSIGNOR TO BATTLE CREEK BREAD WRAPPING MACHINE COMPANY, OF BATTLECREEK, MICHIGAN MECHANICAL MOVEMENT Application 'filed October 9, 1926.Serial No. 140,575.

the claims.

A structure which is a preferred embodiment of my invention isillustrated'in the accompanying drawing, forming a part ofthisapplication, in. which:

i Fig. lis a side elevation of a mechanism embodying the features of myinvention, the

''parts being shown mainly in conventional F i". 2 is a similar vlewwith the partsin I another position.

' In the drawing similar reference characters refer to similar partsthroughout the several views. 7

In the'accompanying drawingl have'illustrated my improvements as I haveembodied the same in a wrapping machine, the part 1 v 7 representing atransfer plunger by means of which the articles are shifted from a feedvconveyor to a wrapping mechanism. These parts, however, are not shown asthey'form no-part of my present invention.

2 represents a gear Wheel connected to a' suitable source of power andcoacting-with r the gear?) having a driving crank 4 thereon.

5 is a rockshaft having an arm 6 thereon connected to the driven member1 by means of the link 7. Therockshaft 5 hasa second arm 8which isconnected to the driving crank by a connecting rodconsisting of thelinks 9 and 10, the links being pivotally connected at 11, the link 9being connected to the crank by I the wrist pin 12 while the link 10 isconnected 9 to the arm 8 by the pivot 13. v

The link 9 is supported at its outer end by the rocker arm l'which ispivoted at 15 and connected'to the'link by the pivot 16. I i In theembodiment illustrated the links and pivots and the rocker 14 are soproportioned and arranged that during a portion of O the strokethe pivotll swings in an'arc of which the pivot 13 is the axis, the result heinthat there is a dwell in the movement of the actuated rockshaft andconsequently to the driven member operatively connected thereto. By thismeans the stroke may be properly timed relative to other moving parts.

My improved mechanical movement is adaptedfor many uses where a movementof this character is desired. The parts are simple and economical instructure and assembling and capable of a very wide adaptation.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is: i

1. In a mechanical movement, the combination of a driving crank, arockshaft provided with an arm, a pivotally mounted rocker arm havingits swinging end disposed in the general direction of the rockshaft, alink connecting the swinging end of said rocker arm to said crank, and asecond link pivotally connected to said arm on said rockshaft and tosaid first mentioned link at a point centrally between its connectionsto said driving crank and rocker arm and so that the pivot connectingsaid links moves during a part of. each cycle of the crankin the arc ofa circle of which the pivot connecting the second link to the rockshaftarm constitutes a center.

2.. In a mechanical movement, the combination of a driving crank, arockshaft provided with an arm, a pivotally mounted rocker arm disposedwith its swinging end in the general direction of the rockshaft, anddriving I connections for said driving crank to said rockshaftcomprising a link connected to said driving crank and to the swingingend of said rocker arm and a second link connected to said arm on saidrockshaft and to said first mentioned link at a point centrally betweenitspivotal connections to the driving crank and rocker arm.

3. In a mechanical movement, the combination of a driving crank, anoscillatingly supported actuated member, a pivotally mounted rocker armdisposed with its swinging end in the general direction of the saidactuated member, and driving connections for said crank to said actuatedmember comprising av link pivotally connected to said crank and to saidrocker arm and a second link pivotally connected to said actuated memberand to the first mentioned link at a point intermediate the pivotalconnections for said driving crank and rocker member andso that during aportion of its travel it moves in the arc of a circle centering in thepivot connecting the second link to the actuated member.

In Witness whereof I have hereunto set my hand.

CARL LIT'TLEFIELD.

